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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

32739 results found.

  1. GRB 100423A: GROND discovery of afterglow
  2. Radio afterglow detection of GRB 100418A with the EVLA
  3. GRB 100414A: Radio Afterglow Detection with the Expanded VLA
  4. GRB 100418A: Continued PAIRITEL NIR Observations
  5. GRB 100418A: WSRT Radio Detection
  6. GRB100418A: REM possible afterglow detection
  7. GRB 100418A: Continuing Swift/UVOT Observations
  8. GRB 100418A: further GROND observations and light curve fit
  9. GRB 100418A: RTT150 optical observations
  10. GRB100420A: MITSuME optical upper limits
  11. GRB 100420A: Swift/UVOT Upper Limits
  12. GRB 100420A: XRT refined analysis
  13. GRB 100418A: SARA second epoch
  14. GRB 100420A: SARA Upper Limits
  15. GRB 100418A: RTT150 observations during the optical afterglow maximum
  16. GRB 100418A: optical observations
  17. GRB 100418A: MASTER-Net optical observations
  18. GRB 100414A: Confirmation of the X-ray afterglow
  19. GRB 100418A: VLT optical observations
  20. GRB 100420A: ROTSE-III Optical Limits
  21. GRB 100418A PAIRITEL NIR Observations
  22. GRB 100418A: ROVOR optical afterglow detection
  23. GRB 100418A: Swift/UVOT Observations
  24. GRB 100418A: Gemini-N redshift confirmation
  25. GRB 100413A: GMRT observation of radio afterglow
  26. GRB 100418A: Swift-XRT Refined Analysis
  27. GRB 100418A: host galaxy detection in the SDSS
  28. GRB100418A: VLT/X-shooter redshift and photometry
  29. GRB 100418A: SARA observations
  30. GRB100414A: SAO RAS optical observations
  31. GRB 100418A: GROND observations; missing author list added
  32. GRB 100418A: GROND observations
  33. GRB 100418A: Swift-BAT refined analysis
  34. GRB 100418A: ROTSE-III Optical Limits
  35. GRB 100413A: Radio Afterglow Detection with the EVLA
  36. GRB 100414A: Suzaku WAM observation of the prompt emission
  37. GRB 100414A: Swift/UVOT Observations
  38. GRB 100414A: Gemini-N observation (correction)
  39. GRB 100414A: GROND Detection of the Optical Afterglow
  40. GRB 100414A: Gemini-N candidate and redshift
  41. GRB 100413A: Suzaku WAM observation of the prompt emission
  42. GRB 100414A: Palomar Transient Factory Observations
  43. GRB 100413B: Swift Confirmation of Burst
  44. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  45. GRB 100413A: Swift-BAT final refined analysis
  46. GRB 100414A: IPN Localization
  47. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  48. Konus-Wind observation of GRB 100414B
  49. GRB 100413A: GROND Upper limits
  50. GRB 100413A: Swift/UVOT Upper Limits
  51. Konus-Wind observation of GRB 100413A
  52. GRB 100413A: Faulkes Telescope South observations
  53. Tentative redshift of GRB100413A from X-ray data
  54. GRB 100413A: SARA upper limit
  55. GRB 100413A: Swift-XRT Refined Analysis
  56. GRB 100413A: Swift-BAT initial refined analysis
  57. GRB 100413: xinglong TNT optical upper limit
  58. GRB 100413A: MASTER-Net optical observations
  59. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  60. Swift-BAT trigger 419015 is not astrophysical
  61. GRB100401A: GROND Upper Limits
  62. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  63. GRB 100331B: GROND Upper limits
  64. Master-Net observations on the Swift trigger on LS V +44 17
  65. GRB 100401A: Swift/UVOT Upper Limit
  66. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  67. GRB 100401A: Fermi GBM detection
  68. GRB 100331B: BOOTES-3 observations
  69. GRB 100316A: R-band limit
  70. GRB 100324B: Suzaku WAM observation of the prompt emission
  71. GRB 100331B: Swift/UVOT Upper Limits
  72. GRB 100331B: Swift/XRT possible afterglow candidate
  73. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  74. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  75. GRB 100331A: BOOTES-3 observations
  76. Konus-Wind observation of GRB 100324B
  77. GRB 100331A: A long GRB detected by INTEGRAL
  78. IPN triangulation of GRB100324B
  79. Konus-Wind observation of GRB 100322A
  80. Short X-ray Transient detected by MAXI/GSC
  81. GRB 100322A: Suzaku WAM observation of the prompt emission
  82. GROND observations of GRB100316D/SN2010bh
  83. GRB 100324A: GROND observations
  84. Emerging Supernova in the Afterglow of GRB 100316D
  85. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  86. SGR 1833-0832: Swift/UVOT Upper Limits
  87. SGR 1833-0832: Archival Chandra Observations
  88. SGR 1833-0832 is pulsed at 7.56 seconds
  89. SGR 1833-0832 is pulsed at 7.56 seconds
  90. Possible pulsation period in SGR 1833-0832
  91. Discovery of the Spin Period of SGR 1833-0832
  92. GRB 100316D: ATCA radio observations
  93. GRB 100319A: correction to GCN 10527
  94. Probable SGR 1833-0832: Swift-XRT refined analysis
  95. Swift-XRT refined position of the probable new SGR 1833-0832
  96. Swift-BAT refined analysis of the probable new SGR 1833-0832
  97. GRB 100219A: MASTER-Net optical alert observations
  98. GRB 100316D: Possible Supernova
  99. GRB 100316D: Pre-burst emission measured by BAT
  100. GRB 100316D: Further Gemini observations

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